// Copyright 2019 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_VULKAN_EXTERNAL_SEMAPHORE_SEMAPHORESERVICE_H_
#define SRC_DAWN_NATIVE_VULKAN_EXTERNAL_SEMAPHORE_SEMAPHORESERVICE_H_

#include <memory>

#include "dawn/native/Error.h"
#include "dawn/native/vulkan/ExternalHandle.h"

namespace dawn::native::vulkan {
class Device;
struct VulkanDeviceInfo;
struct VulkanFunctions;
}  // namespace dawn::native::vulkan

namespace dawn::native::vulkan::external_semaphore {
class ServiceImplementation;

class Service {
  public:
    Service(Device* device, VkExternalSemaphoreHandleTypeFlagBits handleType);
    ~Service();

    static bool CheckSupport(const VulkanDeviceInfo& deviceInfo,
                             VkPhysicalDevice physicalDevice,
                             const VulkanFunctions& fn);
    void CloseHandle(ExternalSemaphoreHandle handle);

    // True if the device reports it supports this feature
    bool Supported();

    // Given an external handle, import it into a VkSemaphore
    ResultOrError<VkSemaphore> ImportSemaphore(ExternalSemaphoreHandle handle);

    // Create a VkSemaphore that is exportable into an external handle later
    ResultOrError<VkSemaphore> CreateExportableSemaphore();

    // Export a VkSemaphore into an external handle
    ResultOrError<ExternalSemaphoreHandle> ExportSemaphore(VkSemaphore semaphore);

    // Duplicate a new external handle from the given one.
    ExternalSemaphoreHandle DuplicateHandle(ExternalSemaphoreHandle handle);

  private:
    // Linux, ChromeOS and Android use FD semaphore and Fuchia uses ZirconHandle.
    std::unique_ptr<ServiceImplementation> mServiceImpl;
};

}  // namespace dawn::native::vulkan::external_semaphore

#endif  // SRC_DAWN_NATIVE_VULKAN_EXTERNAL_SEMAPHORE_SEMAPHORESERVICE_H_
